20620583 has 2 divisors, whose sum is σ = 20620584. Its totient is φ = 20620582.

The previous prime is 20620573. The next prime is 20620591. The reversal of 20620583 is 38502602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20620583 - 2¹⁰ = 20619559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310291 + 10310292.

It is an arithmetic number, because the mean of its divisors is an integer number (10310292).

Almost surely, 2^20620583 is an apocalyptic number.

20620583 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620583 is an equidigital number, since it uses as much as digits as its factorization.

20620583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20620583 is about 4540.9892094124. The cubic root of 20620583 is about 274.2207493427.

The spelling of 20620583 in words is "twenty million, six hundred twenty thousand, five hundred eighty-three".